Conditional Ciphertext-Policy Attribute-Based Encryption Scheme in Vehicular Cloud Computing

Figure 5

(a) Comparison of the average encryption times between CPABE and our system, when the number of access trees is different. (b) Comparison of decryption times between CPABE and our system, when the number of access trees is different. (c) Changes in the ciphertext size of our system, when the number of access trees is different.

(a)

(b)

(c)